What are VOIP phones and how do they work?
These are IP (Internet Protocol) telephones which instead of using a dedicated electric circuit over copper wires– through a central telephone office and then into the circuit-switched telephone network (aka PSTN)–instead a Internet Protocol data network by encapsulating digitized voice data into TCP/IP data packets which are then routed to a call handler. The call handler is actually a VoIP (Voice over IP) server. The company or organization which runs the VoIP server is the VoIP service provider. The VoIP server fulfills and augments the functions normally handled by a Public System Telephone Network (PSTN) Private Branch eXchange (PBX), or telephone switching system. In talking to other IP phones, only the network is used. The VoIP server loads each phone when it powers up with its pre- programmed parameters, and routes calls to the appropriate phone when a call is placed, using the network. The network itself should support “Quality of Service” (QoS) “type of service” (TOS) so as
